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000861788 1001_ $$0P:(DE-Juel1)174091$$aRadelytskyi, Igor$$b0$$eCorresponding author$$ufzj
000861788 245__ $$aStructural, magnetic, and magnetocaloric properties of Fe$_7$Se$_8$ single crystals
000861788 260__ $$aMelville, NY$$bAmerican Inst. of Physics$$c2018
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000861788 520__ $$aThe magnetocaloric effect has been studied in high quality single crystals of Fe7Se8 (3c type) grown by using Bridgman’s method. Magnetization and magnetocaloric effect measurements have been carried out in a magnetic field up to 5 T over the temperature range from 2 to 490 K. The spin reorientation transition from the easy c-axis to the easy c-plane, proceeding in an abrupt fashion, as a first-order phase transition, has been observed near the temperature TR ≈ 125 K. The magnetization curves in the vicinity of this transition were shown to have an S-shape with a clear hysteresis. The first order metamagnetic field induced transitions have been identified above and below TR. The conventional magnetocaloric effect related to the metamagnetic transitions has been found above TR, while below TR the inverse magnetocaloric effect was clearly seen. The existence of both kinds of magnetocaloric effect is important from the point of view of large rotating field entropy change in Fe7Se8 single crystals. The refrigeration capacity associated with a second order phase transition from the ferrimagnetic to the paramagnetic state at the Néel temperature TN ≈ 450 K was found to be weaker than that appearing near TR. The giant anisotropy of the magnetocaloric effect was related to the magnetic anisotropy of Fe7Se8 crystals. The one-ion model of the magnetocaloric effect has been developed and its predictions have been compared with experimental data.
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000861788 7001_ $$00000-0002-2966-130X$$aAleshkevych, P.$$b1
000861788 7001_ $$0P:(DE-HGF)0$$aGawryluk, D. J.$$b2
000861788 7001_ $$0P:(DE-HGF)0$$aBerkowski, M.$$b3
000861788 7001_ $$00000-0002-9100-2938$$aZajarniuk, T.$$b4
000861788 7001_ $$0P:(DE-HGF)0$$aSzewczyk, A.$$b5
000861788 7001_ $$0P:(DE-HGF)0$$aGutowska, M.$$b6
000861788 7001_ $$0P:(DE-HGF)0$$aHawelek, L.$$b7
000861788 7001_ $$0P:(DE-HGF)0$$aWlodarczyk, P.$$b8
000861788 7001_ $$0P:(DE-HGF)0$$aFink-Finowicki, J.$$b9
000861788 7001_ $$0P:(DE-HGF)0$$aMinikayev, R.$$b10
000861788 7001_ $$0P:(DE-HGF)0$$aDiduszko, R.$$b11
000861788 7001_ $$0P:(DE-HGF)0$$aKonopelnyk, Y.$$b12
000861788 7001_ $$0P:(DE-HGF)0$$aKozłowski, M.$$b13
000861788 7001_ $$00000-0001-5636-5541$$aPuz´niak, R.$$b14
000861788 7001_ $$0P:(DE-HGF)0$$aSzymczak, H.$$b15
000861788 773__ $$0PERI:(DE-600)1476463-5$$a10.1063/1.5042344$$gVol. 124, no. 14, p. 143902 -$$n14$$p143902 -$$tJournal of applied physics$$v124$$x1089-7550$$y2018
000861788 8564_ $$uhttps://juser.fz-juelich.de/record/861788/files/1.5042344.pdf$$yPublished on 2018-10-11. Available in OpenAccess from 2019-10-11.
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